<span>Queen Mab is a fairy that goes around and gives people dreams.</span>
I believe it is, "infinitive phrase", and "noun".
To see differences in good and bad writing
A clause is a group of words that contain a subject (the noun or pronoun about which something is being said, usually the doer of the action) and a verb (a doing word). An example of a clause is: The fast, red squirrel darted up a tree. The subject of this clause is the fast, red squirrel and the verb is 'darted'.
